difference between oscillating neutral and shifted neutral quara
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What is the third harmonic problem of Y-Y connected three phase transformer? Can a three-phase star connected motor be started if the star point is connected to Earth? ... Why is the star point connected to the Earth in a 3-phase transformer?
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As in isolated neutral case,3rd harmonics will not flow in line due to its co-phasal nature but will be present in each phase i.e phase to neutral
Ean= Easin wt + Ea3sin 3wt
Harmonics co-phasal voltage has freq 3w and fundamental volatage has w.Their net effective voltage i.e Ean will have it neutral N point oscillates 2w, thus the name came oscillating neutral.
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